Carpal tunnel syndrome is a common disorder characterized by pain, burning , and tingling of the palmar surface of the hand, resulting from compression of the median nerve between the carpal ligament and other structures within the carpal tunnel (entrapment neuropathy). The volume of the contents of the tunnel can be increased by organic lesions such as synovitis of the tendon sheaths or carpal joints, recent or malhealed fractures, tumors, and occasionally congenital anomalies. Even though no anatomic lesion is apparent, flattening or even circumferential constriction of the median nerve may be observed during operative section of the ligament. The disorder may occur in pregnancy, is seen in individuals with a history of repetitive use of the hands, and may follow injuries of the wrists. A familial type of carpal tunnel syndrome has been reported in which no etiologic factor can be identified. Carpal tunnel syndrome can also be a feature of many systemic diseases: rheumatoid arthritis and other rheumatic disorders (inflammatory tenosynovitis); myxedema, amyloidosis, sarcoidosis, and leukemia (tissue infiltration); acromegaly; hyperparathyroidism, hypocalcemia, and diabetes mellitus.
نویسنده : ziba
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